Qaeda Messages Prompt U.S. Terror Warning
"Obama administration officials publicly declined to discuss what specific information had prompted the increased alarm and alerts, citing a desire to protect classified sources and methods.
But intercepting electronic communications is one of the National Security Agency’s main jobs, as the documents leaked by Edward J. Snowden, a former N.S.A. contractor, have only underscored. At the request of intelligence officials, The New York Times withheld some details about the intercepted communications.
Some analysts and Congressional officials suggested Friday that emphasizing a terrorist threat now was a good way to divert attention from the uproar over the N.S.A.'s data-collection programs, and that if it showed the intercepts had uncovered a possible plot, even better